Calculate A+B-C+D
[6410] Calculate A+B-C+D - Look at the series (7, 16, 43, B, A, 1096, 3283, 9844, 29527, C, 265723, D, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B-C+D! - #brainteasers #math - Correct Answers: 19 - The first user who solved this task is Nasrin 24 T
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Calculate A+B-C+D

Look at the series (7, 16, 43, B, A, 1096, 3283, 9844, 29527, C, 265723, D, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B-C+D!
Correct answers: 19
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
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Watch For Fallen Rocks

Driving down a remote road, a motorist sees a sign that says: "Watch For Fallen Rocks."

A couple of miles of careful driving later, he spots some pebbles and stops to pick a few up. Arriving in the next town, the motorist carries the stones into the highway maintenance office.

Placing them on the counter, he says to an official: "Here are your fallen rocks. Now where's my watch?"

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Sir Malcolm Brown

Born 5 Oct 1925; died 27 Mar 1997 at age 71.English geologist who won a worldwide reputation for his contributions to petrology and was one of the few scientists outside America to be invited by NASA to work on the samples of lunar rock brought back by the Apollo 11 mission. From 1979 to 1985, he was Director of the Institute of Geological Sciences (which name Brown changed to the British Geological Survey in 1984).
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